package com.iursp.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class DateUtils {
	public static String DATE_FORMAT = "yyyy-MM-dd";
	 
	  public static String DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
	 
	  public static String DATE_FORMAT_CHINESE = "yyyy年M月d日";
	 
	  /**
	   * 获取当前日期
	   * 
	   * 
	   * @return
	   * 
	   */
	  public static String getCurrentDate() {
	    String datestr = null;
	    SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_FORMAT);
	    datestr = df.format(new Date());
	    return datestr;
	  }
	 
	  /**
	   * 获取当前日期时间
	   * 
	   * 
	   * @return
	   * 
	   */
	  public static String getCurrentDateTime() {
	    String datestr = null;
	    SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_TIME_FORMAT);
	    datestr = df.format(new Date());
	    return datestr;
	  }
	 
	  /**
	   * 获取当前日期时间
	   * 
	   * 
	   * @return
	   * 
	   */
	  public static String getCurrentDateTime(String Dateformat) {
	    String datestr = null;
	    SimpleDateFormat df = new SimpleDateFormat(Dateformat);
	    datestr = df.format(new Date());
	    return datestr;
	  }
	 
	  public static String dateToDateTime(Date date) {
	    String datestr = null;
	    SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_TIME_FORMAT);
	    datestr = df.format(date);
	    return datestr;
	  }
	  /**
	   * 将字符串日期转换为日期格式
	   * 
	   * 
	   * @param datestr
	   * @return
	   * 
	   */
	  public static Date stringToDate(String datestr) {
	 
	      if(datestr ==null ||datestr.equals("")){
	        return null;
	      }
	    Date date = new Date();
	    SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_FORMAT);
	    try {
	      date = df.parse(datestr);
	    } catch (ParseException e) {
	      date=DateUtils.stringToDate(datestr,"yyyyMMdd");
	    }
	    return date;
	  }
	 
	  /**
	   * 将字符串日期转换为日期格式
	   * 自定義格式
	   * 
	   * @param datestr
	   * @return
	   * 
	   */
	  public static Date stringToDate(String datestr, String dateformat) {
	    Date date = new Date();
	    SimpleDateFormat df = new SimpleDateFormat(dateformat);
	    try {
	      date = df.parse(datestr);
	    } catch (ParseException e) {
	      e.printStackTrace();
	    }
	    return date;
	  }
	 
	 
	 
	 
	  /**
	   * 将日期格式日期转换为字符串格式
	   * 
	   * 
	   * @param date
	   * @return
	   * 
	   */
	  public static String dateToString(Date date) {
	    String datestr = null;
	    SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_FORMAT);
	    datestr = df.format(date);
	    return datestr;
	  }
	 
	  /**
	   * 将日期格式日期转换为字符串格式 自定義格式
	   * 
	   * @param date
	   * @param dateformat
	   * @return
	   */
	  public static String dateToString(Date date, String dateformat) {
	    String datestr = null;
	    SimpleDateFormat df = new SimpleDateFormat(dateformat);
	    datestr = df.format(date);
	    return datestr;
	  }
	 
	  /**
	   * 获取日期的DAY值
	   * 
	   * 
	   * @param date
	   *      输入日期
	   * @return
	   * 
	   */
	  public static int getDayOfDate(Date date) {
	    int d = 0;
	    Calendar cd = Calendar.getInstance();
	    cd.setTime(date);
	    d = cd.get(Calendar.DAY_OF_MONTH);
	    return d;
	  }
	 
	  /**
	   * 获取日期的MONTH值
	   * 
	   * 
	   * @param date
	   *      输入日期
	   * @return
	   * 
	   */
	  public static int getMonthOfDate(Date date) {
	    int m = 0;
	    Calendar cd = Calendar.getInstance();
	    cd.setTime(date);
	    m = cd.get(Calendar.MONTH) + 1;
	    return m;
	  }
	 
	  /**
	   * 获取日期的YEAR值
	   * 
	   * 
	   * @param date
	   *      输入日期
	   * @return
	   * 
	   */
	  public static int getYearOfDate(Date date) {
	    int y = 0;
	    Calendar cd = Calendar.getInstance();
	    cd.setTime(date);
	    y = cd.get(Calendar.YEAR);
	    return y;
	  }
	 
	  /**
	   * 获取星期几
	   * 
	   * 
	   * @param date
	   *      输入日期
	   * @return
	   * 
	   */
	  public static int getWeekOfDate(Date date) {
	    int wd = 0;
	    Calendar cd = Calendar.getInstance();
	    cd.setTime(date);
	    wd = cd.get(Calendar.DAY_OF_WEEK) - 1;
	    return wd;
	  }
	 
	  /**
	   * 获取输入日期的当月第一天
	   * 
	   * 
	   * @param date
	   *      输入日期
	   * @return
	   * 
	   */
	  public static Date getFirstDayOfMonth(Date date) {
	    Calendar cd = Calendar.getInstance();
	    cd.setTime(date);
	    cd.set(Calendar.DAY_OF_MONTH, 1);
	    return cd.getTime();
	  }
	 
	  /**
	   * 获得输入日期的当月最后一天
	   * 
	   * @param date
	   */
	  public static Date getLastDayOfMonth(Date date) {
	    return DateUtils.addDay(DateUtils.getFirstDayOfMonth(DateUtils.addMonth(date, 1)), -1);
	  }
	 
	  /**
	   * 判断是否是闰年
	   * 
	   * 
	   * @param date
	   *      输入日期
	   * @return 是true 否false
	   * 
	   */
	  public static boolean isLeapYEAR(Date date) {
	 
	    Calendar cd = Calendar.getInstance();
	    cd.setTime(date);
	    int year = cd.get(Calendar.YEAR);
	 
	    if (year % 4 == 0 && year % 100 != 0 | year % 400 == 0) {
	      return true;
	    } else {
	      return false;
	    }
	  }
	 
	  /**
	   * 根据整型数表示的年月日，生成日期类型格式
	   * 
	   * @param year
	   *      年
	   * @param month
	   *      月
	   * @param day
	   *      日
	   * @return
	   * 
	   */
	  public static Date getDateByYMD(int year, int month, int day) {
	    Calendar cd = Calendar.getInstance();
	    cd.set(year, month-1, day);
	    return cd.getTime();
	  }
	 
	  /**
	   * 获取年周期对应日
	   * 
	   * @param date
	   *      输入日期
	   * @param iyear
	   *      年数  負數表示之前
	   * @return
	   * 
	   */
	  public static Date getYearCycleOfDate(Date date, int iyear) {
	    Calendar cd = Calendar.getInstance();
	    cd.setTime(date);
	 
	    cd.add(Calendar.YEAR, iyear);
	 
	    return cd.getTime();
	  }
	 
	  /**
	   * 获取月周期对应日
	   * 
	   * @param date
	   *      输入日期
	   * @param i
	   * @return
	   * 
	   */
	  public static Date getMonthCycleOfDate(Date date, int i) {
	    Calendar cd = Calendar.getInstance();
	    cd.setTime(date);
	 
	    cd.add(Calendar.MONTH, i);
	 
	    return cd.getTime();
	  }
	 
	  /**
	   * 计算 fromDate 到 toDate 相差多少年
	   * 
	   * @param fromDate
	   * @param toDate
	   * @return 年数
	   * 
	   */
	  public static int getYearByMinusDate(Date fromDate, Date toDate) {
	    Calendar df=Calendar.getInstance();
	    df.setTime(fromDate);
	 
	    Calendar dt=Calendar.getInstance();
	    dt.setTime(toDate);
	 
	    return dt.get(Calendar.YEAR)-df.get(Calendar.YEAR);
	  }
	 
	  /**
	   * 计算 fromDate 到 toDate 相差多少个月
	   * 
	   * @param fromDate
	   * @param toDate
	   * @return 月数
	   * 
	   */
	  public static int getMonthByMinusDate(Date fromDate, Date toDate) {
	    Calendar df=Calendar.getInstance();
	    df.setTime(fromDate);
	 
	    Calendar dt=Calendar.getInstance();
	    dt.setTime(toDate);
	 
	    return dt.get(Calendar.YEAR)*12+dt.get(Calendar.MONTH)-
	        (df.get(Calendar.YEAR)*12+df.get(Calendar.MONTH));
	  }
	 
	  /**
	   * 计算 fromDate 到 toDate 相差多少天
	   * 
	   * @param fromDate
	   * @param toDate
	   * @return 天数
	   * 
	   */
	  public static long getDayByMinusDate(Object fromDate, Object toDate) {
	 
	    Date f=DateUtils.chgObject(fromDate);
	 
	    Date t=DateUtils.chgObject(toDate);
	 
	    long fd=f.getTime();
	    long td=t.getTime();
	 
	    return (td-fd)/(24L * 60L * 60L * 1000L);
	  }
	 
	  /**
	   * 计算年龄
	   * 
	   * @param birthday
	   *      生日日期
	   * @param calcDate
	   *      要计算的日期点
	   * @return
	   * 
	   */
	  public static int calcAge(Date birthday, Date calcDate) {
	 
	    int cYear=DateUtils.getYearOfDate(calcDate);
	    int cMonth=DateUtils.getMonthOfDate(calcDate);
	    int cDay=DateUtils.getDayOfDate(calcDate);   
	    int bYear=DateUtils.getYearOfDate(birthday);
	    int bMonth=DateUtils.getMonthOfDate(birthday);
	    int bDay=DateUtils.getDayOfDate(birthday);
	 
	    if(cMonth>bMonth||(cMonth==bMonth&&cDay>bDay)){
	      return cYear-bYear;
	    }else{
	      return cYear-1-bYear;
	    }
	  }
	 
	  /**
	   * 从身份证中获取出生日期
	   * 
	   * @param idno
	   *      身份证号码
	   * @return
	   * 
	   */
	  public static String getBirthDayFromIDCard(String idno) {
	    Calendar cd = Calendar.getInstance();
	    if (idno.length() == 15) {
	      cd.set(Calendar.YEAR, Integer.valueOf("19" + idno.substring(6, 8))
	          .intValue());
	      cd.set(Calendar.MONTH, Integer.valueOf(idno.substring(8, 10))
	          .intValue() - 1);
	      cd.set(Calendar.DAY_OF_MONTH,
	          Integer.valueOf(idno.substring(10, 12)).intValue());
	    } else if (idno.length() == 18) {
	      cd.set(Calendar.YEAR, Integer.valueOf(idno.substring(6, 10))
	          .intValue());
	      cd.set(Calendar.MONTH, Integer.valueOf(idno.substring(10, 12))
	          .intValue() - 1);
	      cd.set(Calendar.DAY_OF_MONTH,
	          Integer.valueOf(idno.substring(12, 14)).intValue());
	    }
	    return DateUtils.dateToString(cd.getTime());
	  }
	 
	  /**
	   * 在输入日期上增加（+）或减去（-）天数
	   * 
	   * @param date
	   *      输入日期
	   * @param imonth
	   *      要增加或减少的天数
	   */
	  public static Date addDay(Date date, int iday) {
	    Calendar cd = Calendar.getInstance();
	 
	    cd.setTime(date);
	 
	    cd.add(Calendar.DAY_OF_MONTH, iday);
	 
	    return cd.getTime();
	  }
	 
	  /**
	   * 在输入日期上增加（+）或减去（-）月份
	   * 
	   * @param date
	   *      输入日期
	   * @param imonth
	   *      要增加或减少的月分数
	   */
	  public static Date addMonth(Date date, int imonth) {
	    Calendar cd = Calendar.getInstance();
	 
	    cd.setTime(date);
	 
	    cd.add(Calendar.MONTH, imonth);
	 
	    return cd.getTime();
	  }
	 
	  /**
	   * 在输入日期上增加（+）或减去（-）年份
	   * 
	   * @param date
	   *      输入日期
	   * @param imonth
	   *      要增加或减少的年数
	   */
	  public static Date addYear(Date date, int iyear) {
	    Calendar cd = Calendar.getInstance();
	 
	    cd.setTime(date);
	 
	    cd.add(Calendar.YEAR, iyear);
	 
	    return cd.getTime();
	  }
	 
	  /**
	   * 將OBJECT類型轉換為Date
	   * @param date
	   * @return
	   */
	  public static Date chgObject(Object date){
	 
	    if(date!=null&&date instanceof Date){
	      return (Date)date;
	    }
	 
	    if(date!=null&&date instanceof String){
	      return DateUtils.stringToDate((String)date);
	    }
	 
	    return null;
	 
	  }
	 
	  public static long getAgeByBirthday(String date){
	 
	    Date birthday = stringToDate(date, "yyyy-MM-dd");
	    long sec = new Date().getTime() - birthday.getTime();
	 
	    long age = sec/(1000*60*60*24)/365;
	 
	    return age;
	  }
	 
	 
	  /**
	   * @param args
	   */
	  public static void main(String[] args) {
	    //String temp = DateUtil.dateToString(getLastDayOfMonth(new Date()),
	    ///   DateUtil.DATE_FORMAT_CHINESE);
	    //String s=DateUtil.dateToString(DateUtil.addDay(DateUtil.addYear(new Date(),1),-1));
	 
	 
	    long s=DateUtils.getDayByMinusDate("2012-01-01", "2012-12-31");
	    System.err.println(s);
	 
	 
	  }
}
